The color gamut of different proofing
technologies and printing processes usually do not match. Part of the
color gamut that can be achieved by the proofing system is not possible
with the printing process. Trying to match the proof colors with print
colors is where a color
management system can help.

Using a color management system and the
application of ICC compliant color profiles will help to produce quality
proofs that will ensure the same color on press. In order for color
management to work, rigorous quality control measures must be utilized,
kept current, and employed often.